I just installed Ubuntu 14.04 and have tried to configure the adapter which is a Linksys WUSB6300, but seem to have no response. I have tried using the startup CD to activate the adapter but seem to get only errors.
try to go in
System , All Settings-> Software & Updates -> Additional Drivers
and check if there is any driver available , if it is the case , check its case and apply change ,
There is nothing that comes up in the Additional Drivers Sep 6, 2014 at 22:59
Have you tried to install linux-firmware-nonfree? Sep 7, 2014 at 7:20